Possible race between DDL and accessing I_S.INNODB_TABLESPACES_ENCRYPTION

mysqld: /home/travis/src/storage/innobase/buf/buf0buf.cc:4269: buf_block_t* buf_page_get_gen(const page_id_t&, const page_size_t&, ulint, buf_block_t*, ulint, const char*, unsigned int, mtr_t*, dberr_t*): Assertion `found' failed.

180401 23:17:11 [ERROR] mysqld got signal 6 ;

Query (0x7fd7d801fcd8): REPLACE INTO transforms.insert_select_24744  SELECT * FROM (INFORMATION_SCHEMA.`INNODB_TABLESPACES_ENCRYPTION` AS table1 INNER JOIN mysql.`general_log` AS table2 ON ( table2.`user_host` = table1.`ENCRYPTION_SCHEME` ) ) WHERE table1.`ENCRYPTION_SCHEME` = table2.`user_host` LIMIT 5 /* QNO 2811 CON_ID 18 */  /* QNO 2834 CON_ID 18 */

Connection ID (thread ID): 18

Status: NOT_KILLED

#7  0x00007fd823382ca2 in __GI___assert_fail (assertion=0x559920bddd5f "found", file=0x559920bdc030 "/home/travis/src/storage/innobase/buf/buf0buf.cc", line=4269, function=0x559920be1820 <buf_page_get_gen(page_id_t const&, page_size_t const&, unsigned long, buf_block_t*, unsigned long, char const*, unsigned int, mtr_t*, dberr_t*)::__PRETTY_FUNCTION__> "buf_block_t* buf_page_get_gen(const page_id_t&, const page_size_t&, ulint, buf_block_t*, ulint, const char*, unsigned int, mtr_t*, dberr_t*)") at assert.c:101

#8  0x0000559920587497 in buf_page_get_gen (page_id=..., page_size=..., rw_latch=1, guess=0x0, mode=10, file=0x559920c15878 "/home/travis/src/storage/innobase/fil/fil0crypt.cc", line=963, mtr=0x7fd80d909a90, err=0x0) at /home/travis/src/storage/innobase/buf/buf0buf.cc:4269

#9  0x0000559920625e6f in fil_crypt_read_crypt_data (space=0x7fd7b8451ba0) at /home/travis/src/storage/innobase/fil/fil0crypt.cc:962

#10 0x00005599206293cf in fil_space_crypt_get_status (space=0x7fd7b8451ba0, status=0x7fd80d90a040) at /home/travis/src/storage/innobase/fil/fil0crypt.cc:2432

#11 0x000055992034ddb6 in i_s_dict_fill_tablespaces_encryption (thd=0x7fd7d800b360, space=0x7fd7b8451ba0, table_to_fill=0x7fd7d8168a58) at /home/travis/src/storage/innobase/handler/i_s.cc:8566

#12 0x000055992034e2f4 in i_s_tablespaces_encryption_fill_table (thd=0x7fd7d800b360, tables=0x7fd7d8020f58) at /home/travis/src/storage/innobase/handler/i_s.cc:8640

#13 0x000055991fea1fb3 in get_schema_tables_result (join=0x7fd7d80239d8, executed_place=PROCESSED_BY_JOIN_EXEC) at /home/travis/src/sql/sql_show.cc:8872

#14 0x000055991fe3bae8 in JOIN::exec_inner (this=0x7fd7d80239d8) at /home/travis/src/sql/sql_select.cc:3952

#15 0x000055991fe3b18e in JOIN::exec (this=0x7fd7d80239d8) at /home/travis/src/sql/sql_select.cc:3783

#16 0x000055991fe3c402 in mysql_select (thd=0x7fd7d800b360, tables=0x7fd7d8020f58, wild_num=1, fields=..., conds=0x7fd7d8022ab8, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=553782610688, result=0x7fd7d8023930, unit=0x7fd7d800f1a8, select_lex=0x7fd7d800f920) at /home/travis/src/sql/sql_select.cc:4188

#17 0x000055991fe2e69b in handle_select (thd=0x7fd7d800b360, lex=0x7fd7d800f0e0, result=0x7fd7d8023930, setup_tables_done_option=1073741824) at /home/travis/src/sql/sql_select.cc:382

#18 0x000055991fdf3197 in mysql_execute_command (thd=0x7fd7d800b360) at /home/travis/src/sql/sql_parse.cc:4833

#19 0x000055991fdfd1dc in mysql_parse (thd=0x7fd7d800b360, rawbuf=0x7fd7d801fcd8 "REPLACE INTO transforms.insert_select_24744  SELECT * FROM (INFORMATION_SCHEMA.`INNODB_TABLESPACES_ENCRYPTION` AS table1 INNER JOIN mysql.`general_log` AS table2 ON ( table2.`user_host` = table1.`ENCR"..., length=331, parser_state=0x7fd80d90b5e0, is_com_multi=false, is_next_command=false) at /home/travis/src/sql/sql_parse.cc:8013

#20 0x000055991fdea8d2 in dispatch_command (command=COM_QUERY, thd=0x7fd7d800b360, packet=0x7fd7d8017791 "REPLACE INTO transforms.insert_select_24744  SELECT * FROM (INFORMATION_SCHEMA.`INNODB_TABLESPACES_ENCRYPTION` AS table1 INNER JOIN mysql.`general_log` AS table2 ON ( table2.`user_host` = table1.`ENCR"..., packet_length=332, is_com_multi=false, is_next_command=false) at /home/travis/src/sql/sql_parse.cc:1842

#21 0x000055991fde931e in do_command (thd=0x7fd7d800b360) at /home/travis/src/sql/sql_parse.cc:1387

#22 0x000055991ff4e9e1 in do_handle_one_connection (connect=0x5599235f94c0) at /home/travis/src/sql/sql_connect.cc:1402

#23 0x000055991ff4e76e in handle_one_connection (arg=0x5599235f94c0) at /home/travis/src/sql/sql_connect.cc:1308

#24 0x00007fd823f44184 in start_thread (arg=0x7fd80d90c700) at pthread_create.c:312

#25 0x00007fd82345103d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

perl /home/travis/rqg/runall-new.pl --duration=350 --threads=6 --seed=1522624566 --reporters=Backtrace,ErrorLog,Deadlock --validators=TransformerNoComparator --transformers=ConvertSubqueriesToViews,ConvertTablesToDerived,Count,DisableOptimizations,Distinct,EnableOptimizations,ExecuteAsCTE,ExecuteAsDeleteReturning,ExecuteAsDerived,ExecuteAsExcept,ExecuteAsExecuteImmediate,ExecuteAsInsertSelect,ExecuteAsIntersect,ExecuteAsSelectItem,ExecuteAsUnion,ExecuteAsUpdateDelete,ExecuteAsView,ExecuteAsWhereSubquery,Having,InlineSubqueries,LimitRowsExamined,OrderBy,StraightJoin,ExecuteAsPreparedTwice,ExecuteAsTrigger,ExecuteAsSPTwice,ExecuteAsFunctionTwice --redefine=conf/mariadb/general-workarounds.yy --mysqld=--log_output=FILE --mysqld=--log_bin_trust_function_creators=1 --mysqld=--log-bin --mysqld=--max-statement-time=30 --mysqld=--loose-debug_assert_on_not_freed_memory=0 --views --redefine=conf/mariadb/versioning.yy --basedir=/home/travis/server --grammar=conf/runtime/information_schema.yy --vardir=/home/travis/logs/vardir1_1